Immersion type electric water heater with electrode assembly



United States Patent 2,533,469 12/1950 Justiz 3,206,589 9/1965 Ryanetal Primary ExaminerVolodymyr Y. Mayewsky ABSTRACT: An immersion type electric water heater having opposed matching cap-shaped housing members having holes for passage of water and an electrode assembly positioned within said housing members. The electrode assembly comprising equilateral triangularly-shaped bottom and top dielectric plates each having symmetrically-arranged hollow studs on one side thereof, said plates being superimposed and spaced apart, dielectric posts ends of which are fitted into said hollow studs of said plates to connect said plates, electrode plates inserted on said posts, and dielectric hollow cylindrical spacers inserted on said posts to separate adjacent electrode plates.

PATENTEU 0501 lam 3LSM'J M INVIiN'l'UR.

CONRADO GOCOCO IMMERSION TYPE ELECTRIC WATER HEATER WITH ELECTRODE ASSEMBLY This invention relates broadly to electric water heaters of the immersion type. More particularly however, it relates to an improved electrode assembly for immersion type electric water heaters having a pair of matching opposed cap-shaped housing.

One of the objects of this invention is to provide an electrode assembly for immersion type electric water heaters which is detachable as a unit from the casing or housing thereof.

Another object of this invention is to provide an electrode assembly for immersion type electric water heaters, parts of which could be easily assembled.

Still another object of this invention is to provide an electrode assembly which could be easily fitted into the casing or housing of the electric water heater.

A further object of this invention is to furnish an electrode unit for electric water of the type described which could be easily detached from the housing thereby allowing visual inspection of its parts.

The above objects and others inherent in this invention will be apparent from the following detailed description of the accompanying drawing forming part of this specification wherein:

FIG. 1 is an exploded view of an immersion type electric water heater which includes the electrode assembly embodied in this invention.

FIG. 2 is also an exploded view of the same immersion type electric water heater with the parts of the electrode assembly assembled.

FIG. 3 is an enlarged fragmentary view showing two plates of this electrode assembly with portions of the spacers therefor cut away.

FIG. 4 is an elevational view of the assembled immersion electric water heater using this invention of an electrode assembly.

Referring to the drawing, FIGS. 14, there is shown an electric water heater H of the immersion type with a housing or casing comprising a pair of opposed cap-shaped members 1 and 2. The member 1 has a central hole 3 through which the wires 4 and 4 pass for connection to the electrode assembly 5 which constitutes the subject invention and which is discussed in detail in the succeeding paragraphs.

Cap member 1 has also several holes 6 on the flat circular portion 7 thereof and a downwardly circular skirt portion 8 having an externally threaded bottom portion 9. The externally threaded bottom portion 9 of the cap member 1 is adapted to be screwed to the internally threaded top portion 10 of the upwardly extending. circular skirt ll of the cap member 2.

The cap member 2 has a bottom portion 12 which has also several holes (not shown) for water to pass through when the heater is immersed. To allow unrestricted flow of water from the bottom portion 12. the central portion thereof is slightly downwardly offset.

Within the assembled members 1 and 2 is housed this invention of an electrode assembly which is generally designated in the drawing by the reference numeral 5. As shown, the electrode assembly includes a bottom plate 13 and a top plate 13.

The bottom plate 13 has the shape of an equilateral triangle and has three integral hollow studs 14 extending upwardly from one side thereof and which are arranged symmetrically and inwardly of the vertices 15 thereof. To allow use of thinner plates, the plate 13 has an integral triangular stiffening rib 16.

The top plate 13' is identical to the bottom plate 13. It has also the shape of an equilateral triangle, it has a stiffening rib 16', three hollow studs 14 which are arranged also symmetrically and inwardly of the vertices 15. The hollow stud 14, however, extends downwardly.

Into the hollow studs 14 of the bottom plate are fitted the bottom ends of the separable posts 17 while the upper ends of said posts are fitted into the hollow studs 14' of t e top plate to connect the two plates.

Between the top and bottom plates are positioned the electrode plates 18 each of which has three holes through which each of the corresponding posts 17 are inserted. As shown, the electrode plates 18 are separated from each other by the hollow cylindrical spaces 19 which are inserted also on the posts 17. Wires 4 and 4' are each connected to alternate plates 18.

When assembled, as shown in FIG. I of the drawing, this electrode assembly is simply fitted into the cap-shaped housing members where the equilateral triangle-shaped plates are inscribed by the walls of the circular skirts of the respective housing members.

The equilateral triangle-shaped bottom and top plates. posts and spacers are preferably made of any suitable plastic material or hard rubber.

Various modifications may be made on this invention of an electrode assembly for electric water heater without departing from the essence thereof as defined in the appended claim.

Iclaim:

1. In an immersion-type electric water heater having opposed matching cap-shaped housing members, both of said housing members having holes for passage of water, and at least one of said housing members having a central hole, an electrode assembly positioned within said housing members comprising a pair of superimposed spaced-apart dielectric plates, each having an equilateral triangular shape and having integral hollow studs extending from the opposed sides thereof, a plurality of dielectric posts each having opposite ends which are fitted into the respective hollow studs to connect said superimposed dielectric plates, electrode plates inserted on said posts, dielectric spacers inserted on said posts to separate adjacent electrode plates, and terminal wires passing through said central hole in one of said housing members, each of said terminal wires being connected to alternate of said electrode plates. 

